package com.library.web;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.library.bean.Admin;
import com.library.bean.ReaderCard;

/**
 * 拦截器，拦截未登录用户
 * @author Administrator
 *
 */

public class LoginInterceptor implements HandlerInterceptor {
	
	@Override
	public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {
		
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
			throws Exception {

	}

	@Override
	public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {
		HttpSession session = arg0.getSession();
		Admin admin = (Admin) session.getAttribute("admin");
		ReaderCard readercard = (ReaderCard)session.getAttribute("readercard");
		if(admin == null && readercard == null){
			arg1.sendRedirect("/login.html");
			return false;
		}else if (readercard != null){
			return true;
		}else if(admin !=  null){
			return true;
		}else{
			arg1.sendRedirect("/login.html");
			return false;
		}
	}

}